Match screen state change reasons to wakefulness reasons

This change attempts at matching display state reasons to wakefulness
reasons, whenever a display state change is driven by a wakefulness
change. DisplayPowerRequest now has fields to capture wakefulness change
reasons (if the request is driven by a wakefulness change), and these
reasons are populated by PowerGroup. DisplayStateController then
accounts for these wakefulness change reasons when deciding the display
state and state reasons.

Bug: 364349703
Flag: com.android.server.power.feature.flags.policy_reason_in_display_power_request
Test: atest PowerGroupTest DisplayStateControllerTest
Change-Id: I50c528208d90caba30d74daf5e597fa26b555fe2